Personal opinion: For the seated vanity, on both sides, use the same style you have selected for the sink vanity (Kovacs P5042) in a vertical orientation.

So they need to match... The instead of the Kovacs by the sink, could I use 2 of these pendants, then 2 more by the window? I found out that option #2 is on close-out, and I could easily afford 4. Would they provide enough light if I use a 75- or 100-watt equivalent LED?

ok so I guess your other post is null and void?

Do not go with the blue glass it will cast blue on to your face and won't allow much light out, i say go with the tube or the tube pendant.

What about a combo like this? Someone may have to move the sconce box up at some later date, but at the lighting would match.

In my opinion they do not necessarily need to match, particularly because they are different walls. Having complementary lights from the same style line could be nice as well. For one of my clients I used that Kovacs style on both sides of mirror of vanity dressing table and they worked well. There were 2 bulbs per light instead of only one allowing for more light, the glass was frosted providing a softer light without it being blinding, and the light shone toward the face instead of downward (this would be particularly the case for the blue I would think). The clear lights are pretty however you will want to see how bright they are. I have found some, when hung at or near eye level, are blinding and uncomfortably bright on the eyes. The frosted finish helps tone that down.

PSM - thanks for letting me know that the Kovacs work exactly as I had hoped. But to repeat them at the makeup table... that would be a tight fit to the right of the window!

Ah! Ok if your drawings are relatively to scale then that may be tight in the corner. I misunderstood, as the posted question included the Kovacs as an option.

In this case, it looks like you have narrowed it down to the pendants flanking the window as the best option. Selecting from the same style line would be best as sometimes colours of glass (even white)/brightness etc can vary between product brands/lines. Also the frosted finish helps with toning the light down so it is not as blinding as the clear glass ones can sometimes be. Try to see the lights on before you purchase them (many places you cannot return lights that have been installed). I find so often they look different than expected when turned on.

Best of luck with your project!